More real-world problems

- In this lesson, we will solve another real-world problem.…This problem says, "A 5 foot tree grows 2 inches per year.…"Write an algebraic expression that could be used to find…"the height of the tree after y years.…"What would be the height of the tree after 7 years?"…So notice in this problem,…that I've given you the information…for writing the algebraic expression,…and then I've also given you…the problem that we need to solve.…Now let's highlight the important information.…

We know that the tree is 5 feet tall…and it's growing 2 inches per year.…I'm actually going to put a box…around "2 inches per year",…because I know that "per" means multiply.…And 2 inches times the year,…we need to keep that together.…I'm going to write 2y above here to remind me…that we're multiplying 2 times the year.…We need to write an algebraic expression…that can be used to find…the height of the tree…after y years.…

And again, remember, this is the variable that we're using…to represent years.…There's one other thing that we need to take notice of.…

Resume Transcript Auto-Scroll

Author

Released

8/4/2015

Pre-algebra is the first step in high school math, forming the building blocks that lead to geometry, trigonometry, and calculus. This course will help you master the basics: from addition, subtraction, multiplication, and division to new types of numbers (integers and negative numbers) and concepts such as the order of operations and distribution.

This course includes practice challenges and worksheets, as well as tips for educators who are helping students master pre-algebra for Common Core. Karin Hutchinson also helps you evaluate, write, and simplify expressions, and solve word problems and complex algebraic expressions.